Electrophotography – Internal machine environment – Particle or contaminant control
Patent
1998-11-19
2000-03-28
Pendegrass, Joan
Electrophotography
Internal machine environment
Particle or contaminant control
399302, 399314, G03G 1516
Patent
active
060442360
ABSTRACT:
An image forming apparatus which applies a voltage from a power source, to a transfer roller for performing a first transfer for transferring a toner image on a photoreceptor to an intermediate transfer medium, and a second transfer for transferring overlapped color toner image on the intermediate transfer medium to a recording sheet. A transfer voltage based on sheet thickness is detected by a sheet type detecting section and applied to the transfer roller in each transfer stage. When the sheet type detecting section detects that the recording sheet is longer than a periphery of a fixing belt, a heater lamp is turned on between a time when the recording sheet is brought into contact with the fixing roller, and a time when the fixing roller completes one rotation. As a result, it is possible to reduce ozone generated in the image forming apparatus and to make the apparatus compact. Further, with the image forming apparatus, desirable transfer characteristics in accordance with a sheet type are obtained, thus realizing uniform fixing of an unfixed toner image onto the recording sheet.
REFERENCES:
patent: 5204729 (1993-04-01), Maeda et al.
patent: 5729808 (1998-03-01), Bisaiji et al.
patent: 5745830 (1998-04-01), Fujiwara et al.
patent: 5809373 (1998-09-01), Yoda et al.
patent: 5815775 (1998-09-01), Miyasaka et al.
Katoh Atsuyuki
Kinoshita Yoshiya
Sugimura Kenji
Tachiki Hiroshi
Tsuji Masaru
Pendegrass Joan
Sharp Kabushiki Kaisha
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